Bevel gears are used for:

• A. They regulate current
• B. They measure voltage
• C. They store electrical energy
• D. They are shaped like sections of cones and used to transmit power between shafts whose axes intersect

Answer: (D)

Bevel gears are used to transmit power between shafts whose axes intersect, typically changing the direction of drive between two shafts that meet at an angle. Their conical, section-of-a-cone geometry lets the gear teeth mesh on a conical surface, which is what enables smooth transmission when the shafts do not run parallel. The most common case is a 90-degree relationship, but bevel gears can handle other angles as well, providing different gear ratios to adjust speed and torque as needed.

Other options don’t fit because regulating current, measuring voltage, or storing electrical energy are functions of electrical components and circuits, not gears. Bevel gears, by contrast, are a mechanical solution for redirecting power between intersecting shafts.